alleryStart learning →Which enzyme reduces atmospheric nitrogen to ammonia inside a root nodule?
ANitrogenase enzyme
BNitrate reductase
CCarbonic anhydrase
DRibonuclease enzyme
Answer & Solution
Correct answer: A. Nitrogenase enzyme
1. Soil bacteria interact with legume roots to form nodules, and fixation takes place inside them.
2. The process entails the reduction of atmospheric nitrogen to ammonia by means of the enzyme nitrogenase.
3. Nitrogenase is therefore the enzyme plants themselves lack.
4. Ribonuclease appears in plants in a quite different setting, the rejection of incompatible pollen tubes.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 31 "Soil and Plant Nutrition", section 31.3 Nutritional Adaptations of Plants_
Keep practising Soil and Plant Nutrition
Browse all Soil and Plant Nutrition questions for ICAR JRF, or explore more Plant Sciences topics.
Related questions
What do the minerals obtained from trapped insects compensate for in a Venus flytrap?Which two root types does an epiphyte have?In a lichen, what does the algal partner contribute?How do most saprophytic plants actually obtain their food?About how many species of parasitic plants are there?Which term describes a parasitic plant that is fully photosynthetic and uses its host onlyEndomycorrhizae are found in the roots of what proportion of terrestrial plants?What share of the total carbon accessed by plants can mycorrhizal fungi obtain?